26 



BULLETIISr 402, U. S. DEPAETMENT OF AGEICULTUEE. 



plat of a pure-line selection of Sixty-Day oats is shown in figure 7. 

 The Burt oat (C. I. No. 293) has been grown only four years. In 

 these years it has averaged 57.9 bushels, as compared with 55.5 

 bushels from the Kherson variety for the same period. 



In the fall of 1907 a plat of Boswell Winter oats was sown. While 

 the winter survival was low, the plat yielded at the rate of 15.7 

 bushels per acre. Seed of this variety has been sown five other 

 years, and each time the plants have entirely winterkilled. 



Fig. 7. — Plat of a pure-line selection of Sixty-Day oats at the Akron Field Station, with the farm build- 

 ings in the background, in 1910. 



Table XVIII shows the average dates of heading and maturity, 

 height, weight per bushel, and yield of five varieties of oats repre- 

 senting all three of the spring groups. The White Tartarian was 

 not grown in 1909, 1910, and 1911. The average yields are shown 

 graphically in figure 8. 



Table XVIII. — Average dates of heading and maturity, height, yield of grain and straw, 

 and weight per bushel of five varieties of oats grown at the Akron Field Station, Akron, 

 Colo., 1908 to 1915, inclusive. 



Group and variety. 



C.I. 

 No. 



Dates of— 



Height. 



Yield per acre. 



Weight 



Heading. 



Maturity. 



Grain. 



Straw. 



bushel. 



Early: 



Kherson 



459 

 165 



619 

 134 



300 



June 26 

 June 27 



July 6 

 July 8 



July 11 



July 20 

 July 19 



Aug. 1 

 Jul^ 31 



Aug. 9 



Inches. 

 27 

 27 



31 

 32 



34 



Bushels. 

 44.7 

 39.3 



43.9 

 41.9 



34.8 



Pounds. 

 1,394 

 1,418 



2,014 

 2,119 



2,538 



Pounds. 

 31.3 



Sixty-Day 



30.6 



Midseason: 



Colorado No. 37 



35.0 



Swedish Select 



32.5 



Late: 



White Tartarian i 



34.0 







1 Not grown in 1909, 1910, and 1911. 



